DSEP100 Operator Manual
4
5.5.5
WHY HAVE MUTLIPLE VOLTAGE AND FREQUENCY ALARM STAGES? ................. 27
5.5.6
RELATIVE MERITS OF R.O.C.O.F AND VECTOR SHIFT ............................................ 27
5.5.6.1
R.O.C.O.F. SUMMARY ............................................................................................ 27
5.5.6.2
VECTOR SHIFT SUMMARY ................................................................................... 27
5.5.6.3
EXAMPLE OF POTENTIAL TO NOT DETECT A MAINS FAILURE ....................... 28
5.5.7
R.O.C.O.F. ....................................................................................................................... 29
5.5.7.1
EXAMPLE OF ROCOF (FREQUENCY DIP UPON MAINS FAILURE) ................... 29
5.5.7.2
EXAMPLE OF ROCOF (FREQUENCY RISE UPON A MAINS FAILURE) ............. 30
5.5.8
VECTOR SHIFT .............................................................................................................. 31
5.5.9
EXAMPLE OF A VECTOR SHIFT (INCREASE IN LOAD UPON MAINS FAILURE) ..... 31
5.5.10
EXAMPLE OF A VECTOR SHIFT (DECREASE IN LOAD UPON MAINS FAILURE) ... 32
5.6
ZERO SEQUENCE VOLTAGE .............................................................................................. 33
5.7
POSITIVE SEQUENCE VOLTAGE ....................................................................................... 33
5.8
NEGATIVE SEQUENCE VOLTAGE ...................................................................................... 33
5.9
ASYMMETRY ......................................................................................................................... 33
5.10
PHASE ROTATION ............................................................................................................ 33
6
FRONT PANEL CONFIGURATION ................................................................... 34
6.1
DISPLAY EDITOR .................................................................................................................. 34
6.1.1
ACCESSING THE DISPLAY EDITOR ............................................................................ 34
6.1.2
EDITING A PARAMETER ............................................................................................... 34
6.2
MAIN CONFIGURATION EDITOR ........................................................................................ 35
6.2.1
SETTING LOCK .............................................................................................................. 35
6.2.2
ACCESSING THE MAIN CONFIGURATION EDITOR ................................................... 35
6.2.3
EDITING A PARAMETER ............................................................................................... 36
6.2.4
DISPLAY EDITOR CONFIGURATION TABLES ............................................................ 36
6.2.5
MAIN EDITOR CONFIGURATION TABLES ................................................................... 37
7
FAULT DIAGNOSIS .......................................................................................... 39
8
MAINTENANCE, SPARES, REPAIR AND SERVICING ................................... 40
8.1
WARRANTY ........................................................................................................................... 40
8.2
DISPOSAL ............................................................................................................................. 40
